White Rodgers 1F72 5/2 Day Programmable Heat Pump Thermostat

Thermostat Compatibility

Thermostat Details

Figure 1. Thermostat base

The thermostat base includes various terminals and jumpers for system configuration. Key components include:

• W904 Clip for Celsius (current location)
• W905 Clip for Slow Cycle (current location)
• W903 Clip to Disable EMR Feature (current location)
• W903 (location on earlier models)
• W904 & W905 (location on earlier models)
• W906 for Emergency Heat Second Stage Fan Control
• O/B Terminal Switches Selection
• Mounting holes
• Terminal block for W2, E, O/B, R, G, C, Y, L

Contents

• Preparations
• Thermostat Details
• Removing Old Thermostat
• Mounting and Wiring
• Check Thermostat Operation
• Programming your Thermostat
• Specifications
• Troubleshooting

1 Preparations

Failure to follow and read all instructions carefully before installing or operating this control could cause personal injury and/or property damage.

Assemble the following tools:

• Hand or Power Drill with 3/16 inch drill bit (if needed)
• Flat Blade Screwdriver
• Wire Cutter/Stripper
• Spirit Level and Plumb Bob (optional, thermostat does not need to be level to work properly)

3 Removing Old Thermostat

To prevent electrical shock and/or equipment damage, disconnect electrical power to the system at the main fuse or circuit breaker until installation is complete.

Before removing wires from the old thermostat's switching subbase, label each wire with the terminal designation it was removed from.

1. Remove Old Thermostat: A standard heat/cool thermostat consists of three basic parts: the cover, the base, and the switching subbase.
2. Shut off electricity at the main fuse box until installation is complete. Ensure that electrical power is disconnected.
3. Remove the front cover of the old thermostat. With wires still attached, remove the wall plate from the wall. If the old thermostat has a wall mounting plate, remove the thermostat and the wall mounting plate as an assembly.
4. Identify each wire attached to the old thermostat using the labels enclosed with the new thermostat.
5. Disconnect the wires from the old thermostat one at a time. DO NOT LET WIRES FALL BACK INTO THE WALL.
6. Install the new thermostat using the following procedures.

ATTENTION! This product does not contain mercury. However, this product may replace a unit which contains mercury. Do not open mercury cells. If a cell becomes damaged, do not touch any spilled mercury. Wearing non-absorbent gloves, take up the spilled mercury and place into a container which can be sealed. If a cell becomes damaged, the unit should be discarded. Mercury must not be discarded in household trash. When the unit this product is replacing is to be discarded, place in a suitable shipping container. Refer to www.white-rodgers.com for location to send the product with mercury.

4 Mounting and Wiring

Do not use on circuits exceeding specified voltage. Higher voltage will damage control and could cause shock or fire hazard.

Do not short out terminals on gas valve or primary control to test. Short or incorrect wiring will damage thermostat and could cause personal injury and/or property damage.

Thermostat installation and all components of the system shall conform to Class II circuits per the NEC code.

Electric/Gas Jumper (Fan Option)

• If your emergency or auxiliary system will energize the blower, then jumper W906 on the thermostat base must be cut.
• If your emergency or auxiliary heat system requires that the thermostat energize the fan circuit, do not cut jumper W906.
• If you are unsure of your application, contact a qualified serviceperson.

°F or °C Selection

The factory default setting for temperature display is Fahrenheit. If you want the temperature in Celsius, clip jumper W904.

Fast or Slow Cycle Selection

The factory default setting is fast cycle. If you prefer slow cycle, clip jump W905. The 1st stage cycles at approximately 1.2°F and 2nd stage at 0.75°F for fast cycle. For slow cycle, the 1st stage and 2nd stage would be 1.5°F and 1.2°F respectively.

Energy Management Recovery (EMR)

This thermostat is set to operate with EMR, which causes the thermostat to start the heating or cooling system early to have the room temperature reach the program setpoint at the time the period is to start. To disable EMR, clip jumper W903.

O/B Terminal Switch Selection

The O/B switch is factory set to "O" position, accommodating most heat pump applications where the changeover relay is energized in COOL. If your system requires the changeover relay to be energized in HEAT via the "B" terminal, move the O/B switch to the "B" position.

Take care when securing and routing wires so they do not short to adjacent terminals or rear of thermostat. Personal injury and/or property damage may occur.

Attach Thermostat Base to Wall

1. Remove the packing material from the thermostat. Gently pull the cover straight off the base.
2. Connect wires beneath terminal screws on base using the appropriate wiring schematic (see Figures 2, 3, and 4).
3. Place base over hole in wall and mark mounting hole locations using the base as a template.
4. Move base out of the way. Drill mounting holes.
5. Fasten base loosely to wall using two mounting screws. Place a level against the bottom of the base, adjust until level, and then tighten screws. (Leveling is for appearance only.) If using existing mounting holes or if drilled holes are too large, use plastic screw anchors.
6. Push excess wire into the wall and plug the hole with a fire-resistant material (like fiberglass insulation) to prevent drafts.

Battery Location

This thermostat does not require batteries to operate. The 2 "AAA" alkaline batteries are for the thermostat to remember the programming if AC voltage is lost. If the display shows BATT or CHANGE ? when AC power is not present, the batteries are low and should be replaced with fresh "AAA" alkaline batteries. Install batteries along the top of the base with the positive (+) ends to the right.

Figure 2. Typical wiring diagram for single transformer systems

Figure 3. Typical wiring diagram for two transformer systems with NO safety circuits

Figure 4. Typical wiring diagram for two transformer systems with safety circuits in BOTH systems

To prevent static discharge problems, touch the side of the thermostat to release static build-up before touching any keys.

If at any time during testing your system does not operate properly, contact a qualified serviceperson.

Check Thermostat Operation

Fan Operation

If your system does not have a G terminal connection, skip to Heating System.

1. Turn on power to the system.
2. Move the FAN switch to ON. The blower should begin to operate.
3. Move the FAN switch to AUTO. The blower should stop immediately.

Heating System

1. Move the SYSTEM switch to HEAT. If the auxiliary heating system has a standing pilot, light it.
2. Press the Up Arrow ⬆️ to adjust the thermostat setting to 1°F above room temperature. The heat pump system should begin to operate. If the Flame icon (?) and Snowflake icon (❄️) are flashing, the compressor lockout feature is operating.
3. Adjust the temperature setting to 4°F above room temperature. The auxiliary heat system should begin to operate, and the Flame icon (?) will be flashing.
4. Press the Down Arrow ⬇️ to adjust the thermostat setting below room temperature. The heating system should stop operating.

Emergency System

EMER bypasses the Heat Pump to use the heat source wired to terminal E. EMER is typically used when compressor operation is not desired, or you prefer back-up heat only.

1. Move the SYSTEM switch to EMER. EMER will flash on the display.
2. Press the Up Arrow ⬆️ to adjust the thermostat setting above room temperature. The Aux heating system will begin to operate, and the Flame icon (?) will display flashing.
3. Press the Down Arrow ⬇️ to adjust the thermostat below room temperature. The Aux heating system should stop operating.

Cooling System

To prevent compressor and/or property damage, if the outdoor temperature is below 50°F, DO NOT operate the cooling system.

1. Move the SYSTEM switch to COOL.
2. Press the Down Arrow ⬇️ to adjust the thermostat setting below room temperature. The blower should come on immediately on high speed, followed by cold air circulation.
3. Press the Up Arrow ⬆️ to adjust the temperature setting above room temperature. The cooling system should stop operating.

The Thermostat Buttons and Switches

• ⬆️ (Up arrow): Raises temperature setting.
• ⬇️ (Down arrow): Lowers temperature setting.
• TIME: TIME button.
• PRGM: PRGM (program) button.
• RUN: RUN (program) button.
• HOLD: HOLD button.
• FAN: FAN switch (ON, AUTO).
• SYSTEM: SYSTEM switch (COOL, OFF, HEAT, EMER).

The Display

• (9) Indicates day of the week.
• (10) Indicates a malfunction with the system.
• (11) Flame icon (?) is displayed when the SYSTEM switch is in the HEAT position. Flame icon (?) is displayed flashing when 2nd-stage heat (Aux or Emergency) is energized. Snowflake icon (❄️) is displayed (non-flashing) when the SYSTEM switch is in the COOL position. Snowflake and Flame icons will be displayed (flashing) if the thermostat is in lockout mode to prevent the compressor from cycling too quickly.
• (12) EMER is displayed flashing when the system switch is in EMER position.
• (13) Alternately displays current time and temperature.
• (14) The word HOLD is displayed when the thermostat is in the HOLD mode.
• (15) Displays currently programmed set temperature (blank when SYSTEM switch is in the OFF position).
• (16) "BATT" or "CHANGE ?" is displayed when batteries are low and should be replaced.

Figure 5. Thermostat display, buttons, and switches

Configuration Menu

The configuration menu allows you to set certain thermostat operating characteristics. Enter the menu by pressing PRGM and RUN simultaneously while in RUN mode.

• Press HOLD to advance to the next menu item or TIME to go backwards.
• Press RUN to exit the menu and return to program operation. The thermostat will revert to normal operation if no keys are pressed within fifteen minutes.

Configuration Options:

1. Fast Second Stage Heat (FA): Select ON (default) for fast cycling or OFF for slow cycling.
2. Compressor Lockout (CL): Select ON to wait 5 minutes before turning on the compressor after power loss or between heating/cooling cycles to protect the compressor. Select OFF if the compressor has a built-in delay. The Snowflake and Flame Icons will flash for about five minutes when the thermostat's compressor time delay occurs.
3. Temperature Display Adjustment: Adjust the room temperature display from -3°F to +3°F to match your previous thermostat.
4. Backlit Display (dL): (Not available on earlier models) Select ON for continuous backlight or OFF.

* Press HOLD to advance to next item or TIME to move backwards to previous item.

** Not available on earlier models.

Programming Your Thermostat

Plan your thermostat's program for maximum comfort and efficiency. Program cooler (warmer) temperatures when the building is vacant or during periods of low activity.

The thermostat has factory preprogrammed times and temperatures. If this program suits your needs, press the RUN button. Otherwise, follow these steps to customize your program.

Determine the time periods and temperatures for your weekday and weekend programs. You must program four periods for both weekday and weekend programs. You can choose start times, heating temperatures, and cooling temperatures independently for both.

Set Current Time and Day

1. Press TIME. The display shows the hour.
2. Press and hold ⬆️ or ⬇️ until the correct hour and AM/PM designation is shown.
3. Press TIME. The display shows the minutes.
4. Press and hold ⬆️ or ⬇️ until the correct minutes are shown.
5. Press TIME. The display shows the day of the week.
6. Press ⬆️ or ⬇️ until the current day is shown.
7. Press RUN. The display will show the correct time and room temperature alternately.

Enter Heating Program

1. Move the SYSTEM switch to HEAT.
2. Press PRGM. "MO TU WE TH FR" (weekday program) will appear, along with the start time and temperature for the 1st heating period.
3. Press ⬆️ or ⬇️ to change the displayed temperature for the 1st heating period.
4. Press TIME (the programmed time will flash). Press ⬆️ or ⬇️ until your selected time appears (changes in 15-minute increments). Press TIME again to return to temperature adjustment.
5. Press PRGM. The start time and setpoint temperature for the 2nd heating period will appear.
6. Repeat steps 4 and 5 for the 2nd, 3rd, and 4th heating program periods.
7. Press PRGM. "SA SU" (weekend program) will appear, along with the start time and temperature for the 1st heating period.
8. Repeat steps 4 through 8 to complete weekend heating programming.
9. Press RUN when finished.

Enter Cooling Program

If the outside temperature is below 50°F, disconnect power to the cooling system before programming. Energizing the air conditioner compressor during cold weather may cause personal injury or property damage.

1. Move the SYSTEM switch to COOL.
2. Follow the procedure for entering your heating program, using your selected cooling times and temperatures.

Check Your Programming

1. Move the SYSTEM switch to HEAT.
2. Press PRGM to view the 1st weekday heating period time and temperature. Press PRGM sequentially to view each period for weekday and weekend programs. You may change any time or temperature during this procedure.
3. Press RUN.
4. Move the SYSTEM switch to COOL.
5. Repeat step 2 to check cooling temperatures.
6. Press RUN to begin program operation.

Your thermostat is now completely programmed!

Sample Heating/Cooling Schedule Plan (Factory Program)

Specifications

Electrical Data

• Electrical Rating: 20 to 30 VAC 50/60 Hz.
• Load per terminal: 0.05 to 1.0 Amps
• Maximum Total Load (All terminals combined): 1.5 Amps

Thermal Data

• Setpoint Temperature Range: 45°F to 90°F (7°C to 32°C)
• Operating Ambient Temperature Range: 32°F to 105°F
• Operating Humidity Range: 0 to 90% RH (non-condensing)
• Shipping Temperature Range: -40°F to 150°F

8 Troubleshooting

Reset Operation

If a voltage spike or static discharge blanks the display or causes erratic operation, press ⬆️, ⬇️, and TIME simultaneously to reset the thermostat. This also resets to factory defaults. If the thermostat still does not function correctly after resetting, contact your heating/cooling service person or place of purchase.

Batteries

For optimum performance, replace batteries once a year with fresh "AAA" alkaline batteries.

Troubleshooting Table

HOMEOWNER HELP LINE: 1-800-284-2925

White-Rodgers is a division of Emerson Electric Co. The Emerson logo is a trademark and service mark of Emerson Electric Co.

White Rodgers

www.white-rodgers.com www.emersonclimate.com